Combination concrete-mixer turntable and subgrader



March 4, 1930. J. w. 'HELTZEL 1,749,101 COMBINATION coucnfi'rn MIXERTURNTABLE AND snack/mm Filed July 27, 1925 2 Sheets-Sheet 1 QM w March4, 1930. J. w. HELTZEL 1,749,101

COMBINATION CONCRETE MIXER TURNTABLE AND SUBGRADER Filed July 27, 1925 2Sheets-Sheet 2 a2 o 43 v //i. j. 4,26 i u u 14k; a; y 29 Patented Mar.4, 1930 NITED STATES PATIENT OFFICE eosnrn WILLIAM nnmznn, or WARREN,OHIO COMBINATION CONCRETE-MIXER TURNTABLE AND SUBGRALDEB Applicationfiled m 27,

v '10 advance of the concrete mixer, so that trucks used forhauling thesand, gravel, cement and other material can be run onto the turntableand then turned around to bring their rear ends toward the mixer forconveniently dumping the material, as well as turning the truck aroundso that it can move away con- 'veniently after being emptied. The use ofsuch turntables, although a convenience as compared with the non-use ofsuch turntables,

10 has been found to be of disadvantage in several respects. Thus, theadvancing movement of the turntable involves labor and time. It is alsousually necessary to position the turntable a distance in advance of theconcrete mixer, so that the trucks, after being turned around, have tobe backed up from the turntable to the mixer, thus requiring the trucksto move over the turntable in going to and leaving the mixer, resultingin delays. In some cases the trucks in leaving the concrete mixer passto one side of the turntable, and when the space for the passage of thetrucks is narrow it has happened that the side forms or rails have beendisplaced.

With the present device, the turntable is associated with the concretemixer, and is disposed immediately in front thereof, so that the trucksdump the materials directly into the skip or receiver of the mixer, andthe turntable is also moved forwardly with the mixer. Furthermore, theturntable is supported from the side forms or rails when be- 1ng movedwith the mixer, and is supported on the ground or sub-base when in.position to receive the trucks thereon. By such arrangement theobjections ,to turntables heretofore used are overcome, and severaladvantages are gained.

Another object of the invention is to combine with the turntable, meansfor finishing 1925. semi No. 46,423.

-the sub-base as the turntable is moved forwardly with the concretemixer, so as to smooth over any depressions or irregularities in thesurface of-the sub-base caused by the trucks moving thereover to andfrom the turntable.

.With the fore oing and other objects in view, which will e apparent asthe description proceeds, the invention resides in the construction andarrangement of parts as hereinafter described and claimed, it beingunderstood that changes can be made within the scope of what is claimed,without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, whereinFigure 1 is a side elevation of the turntable and concrete mixer, with atruck on the turntable, the near side form or rail being removed.

Fig. 2 is an enlarged side elevation of the turntable showing the basethereof raised from the sub-base of the road.

Fig. 3 is aplan view of the turntable.

' Fig. 4 is a front view thereof.

Fig. 5 is an enlarged sectional detail on the line 55 of Fig. 3.

A base 10 is provided which is of suitable size,'being rectangular inshape and preferably constructed of structural steel. Said base or framecomprises the front and rear beams 11 and 12', respectively, and thelongitudinal side beams 13. The beams 13 are connected by cross beams 14which are in turn connected by beams 15, and a circular track 16 issecured to and located between. the beams 14 and '15. The track 16 has ahub 17 connected to the track .by spokes 18, and the V hub receives aking pin 19.

The turntable proper, hereinafter referred -to as the turntableplatform, has the parthe latform for free turning'movement on the ase.The axles of the wheels 24 are journaled in bearings 25 secured on, themembers 23. The runways 21 are sufliciently wide and long so thatdifferent makes of trucks may be run onto the turntable. 7

Rollers 26 are mounted on the beams 11 and 12 to support the ends of therunways 21 when said runways are in longitudinal position, therebypreventing the ends of the runways from being depressed when the truckruns onto and off the turntable. This will prevent the turntableplatform from tilting on the base when the truck moves on and off theplatform.

Approaches 27 are hinged, as at 28-, to the front beam 11, and are alsopreferably of channel iron, and their forward lower ends are widened andare adapted to rest on the ground or sub-base. The forward ends of therunways 21 register with said approaches, so that the truck may readilymove up and down the approaches on and off the platform.

The base 10 rests on the sub-base or ground 7 when the turntable is inposition to receive the trucksther'eon and the turntable is supportedfrom the side forms or rails 34 when the-turntable is moved.' The sideforms or rails 34 define the opposite edges of the road underconstruction, the concrete being I poured and finished off betweensaid-forms or rails, as well known. In order to. support the base 10from the rails. 34, secondary transverse beams 29 are provided at thefront and rear corners of the base 10 and extend across the rails 34,the inner ends of said j beams being hingedly connected, as at 3O,

with the beams 11 and 12.- Transverse rods or axles 31 are held bbrackets 32 secured to the beams 29, said ro s extendingtransversescrewin ly over the rails 34, and flanged wheels 33 arerotatable and slidable on said'rods and roll on the rails 34. Raisingand lowering screws 35 are screw-threaded through upstandin yqkes ormembers 36 secured to the ends 0 the beams 11 and 12, and said screwsbear downwardly on the beams 29 between the ends of said beams 29,whereby said beams. 29 provide levers to sup ort, the base or frame 10,from the whee s 33. Thus, by the screws 35 'downwardl the member 36 areraised, which will raise the base 10, and the beams or levers 29 willtilt slightly, the inner ends of. the beams 29 being raised with thebase 10 andthe ends of the beams 11 and 12 moving toward the beams 29.In this way the base 10 is raised oil the sub-base or ground, to supportthe structure from the rails. 34, so that the device maybe readily movedlengthwise of the roadway on the. rails. When the turntable haa beenpositioned, the screws 35 are rotated so asto screw upwardly in themembers 36, and this will let the base 10 down on the ground or sub-baseso that when a truck moves onto the turntable, the weight of the truckwill be transmitted to the ground or sub-base with out subjecting therails or forms 34 to excessive strains, such as would be the case if theweight of the turntable and truck were im-,

rods 37 limit the separation of the beams 29 i and base 10, and the nuts37 may be adjusted on the rods 37 in order to regulate the amount thatthe base 10 can move away from the s beams 29. I In order to preventlateral movement of the turntable on the rails 34, especially when w theturntable isbeing moved over the subbase, rollersor wheels 38 areprovided to contact with the inner sides of the' forms or rails 34, andsaid rollers 38 are carried by brackets 39 which are secured to thebeams 29. Said brackets 39 are preferably adjustable longitudinally ofthe beams 29. so that the rollers.

38 maybe adjusted for roads of diherent widths. It is also apparent thatthe wheels 33 are adjustable longitgdinally on the rods 1 or axles 31toadjust-the turntable for roads may be adjustable longitudinally on thebeams 29, and that the hinges30 may also'be adjusted longitudinally ofthe beams 11 and province of a skilled 41 of the concrete. mixer..

.95 of different widths, and that the brackets 32 cured to the rear beam12v and extend rear wardly. These barsmay be attadhed to the body or ameofthe concrete mixer 42 so that the turntable will move forwardly andrearwardly with the mixer, or said bars may be so arranged as to abutthe body or frame of the mixer so that the mixer pushes the turntableforwardly, without any direct connection between theturntable and mixer.The device is also used. for giving the subba'se'a final. finishimmediately in advance of the concrete mixer, so as to smooth 01f thesurface of the sub-base, especially when said surface, after beingfinished off in advance of the concrete mixer and turntable in the usualway, istor'njup or damaged by thewheels of the trucks moving to and fromthe turntable.

to the front beam 11 and depends slightly from the bottom of said beam.Said lade enters the sub-base when the base 10 is let down on theground, but does not materially injure the sub-base and merely cuts atransverse slot in the surface. When the base '10 is lifted off thesub-base, the blade 44 will then be in position, as seen in Fig. 2, toscrape the surface of the sub-base when the turn-' table is movedforwardly so as to smooth off the surface.

Scarifier teeth 45 are disposed in front of the scraperblade 44, inorder that said blade can more effectively "smooth the surface of thesub-base. Thus, as the turntable is advanced with the concrete mixer, itwill smooth and finish the surface of the sub-base, and therebyeliminate wheel tracks and other irregularities in the surface of thesub-base. The present turntable facilitates the work in the constructionof the road. Thus, the trucks can be moved quickly to and from theconcrete mixer. When a loaded truckapproaches the turntable, the frontwheels of the truck pass over the approaches 27 onto the runways 21, andthe rear wheels of the truck can then move'over the approaches onto therunways. The truck is then quickly turned around so that the rear endthereof is 4o brought adjacent to the concrete mixer,and

' the material may then be quickly dumped directly into the skip orreceiver 41 of the concrete mixer, as seen in Fig. 1. The truck may thenmove forwardly off the turntable, 45 and the next truck may then bemoved on the turntable. No time is lost, as compared with methodsheretofore used, the number of trucks in a fleet may be reduced,inasmuch as no backing ofthe trucks is necessary, and the trucks may bemoved on and off the turntable in quick succession. Also, when theconcrete mixer is moved forwardly the turntable will move with themixer, so as to lose no appreciable amount of time in changing theposito operate the screws 35 to raise the base 10 off the ground whenthe turntable is moved, and to turn said screws to let the base 10 downon the ground again after the concrete mixer and turntable have beenadvanced the desired distance. The approaches 27may be swung upwardlyoff the sub-base while the turntable is being advanced.

Having thus described the invention, what is claimed as new is:-

tion of the turntable, it only being necessary 1. A turntablecomprising, in combination with side rails for defining the edges of aroad under construction, a base between said rails, a turntable platformon the base, and supporting means mounted on said rails and adjustablyconnected with the base for raising the base to support it from saidmeans and for lowering the base to let it down on the ground.

2. A turntable comprising, in combination with the side rails fordefining the edges of a road under construction, a base between therails, a turntable platform on the base, wheels on the rails, and meansadjustably connecting said wheels with the base for raising and loweringthe base so as to support the base from said wheels when the base I israised and to let the base down on the ground.

3. A turntable comprising, in combination with the side rails fordefining the edges of aroad under construction, a base between therails, a turntable platform on the base, members hingedly connected withthe base and extending over said rails, wheels connected with saidmembers and movable on said rails,

and adjusting means connecting said members and base for raising andlowering the ase.

4. A turntable comprising a base adaptedto be disposed between the siderails between which a road is constructed, a turntable platform thereon,members-adjustably connected with the base and extending to oppositesides thereof to extend over said rails, and means carried by saidmembers movable on said rails.

5. A turntable comprising a base adapted to be disposed between the siderails between which a road is constructed, a turntable platform thereon,members adjustably connected with the base and extending to oppositesides thereof to extend over said rails, rods carried by said members toextend across said rails, wheels slidable and rotatableon said rods tomove on said rails,

and means carried by said members to engage the rails and preventtransverse displacement of said base and members.

6. A turntable comprising'wheels to roll on the side rails defining theside edges of a road under construction, a base adapted to be disposedbetween said rails and connected to said wheels for up and down movementOE and on the ground, and a turntable platform mounted on said base. I

In testimony whereof I hereunto afiix m signature.

JOSEPH WILLIAM HELTZEL.

